JPH02204102A - Pneumatic tire for agriculture - Google Patents
Pneumatic tire for agricultureInfo
- Publication number
- JPH02204102A JPH02204102A JP1025522A JP2552289A JPH02204102A JP H02204102 A JPH02204102 A JP H02204102A JP 1025522 A JP1025522 A JP 1025522A JP 2552289 A JP2552289 A JP 2552289A JP H02204102 A JPH02204102 A JP H02204102A
- Authority
- JP
- Japan
- Prior art keywords
- radially outer
- tire
- radial
- radially
- blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007599 discharging Methods 0.000 abstract 2
- 230000007423 decrease Effects 0.000 description 6
- 241000209094 Oryza Species 0.000 description 4
- 235000007164 Oryza sativa Nutrition 0.000 description 4
- 235000009566 rice Nutrition 0.000 description 4
- 230000035515 penetration Effects 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/08—Tyres specially adapted for particular applications for agricultural vehicles
Landscapes
- Tires In General (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、トレッ１部に羽根を有するラグが設けられ
た農業用空気入りタイヤに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an agricultural pneumatic tire in which a tread portion is provided with vaned lugs.
【釆二弦遺
従来、水田等で使用される農業用空気入りタイヤとして
は２例えば実開昭１３０−１３８８０７号公報に記載さ
れているようなものが知られている。このものは、トレ
ッド部に半径方向外側に向かって突出しその幅がタイヤ
幅と略等しいラグが周方向に等距離離れて複数個設けら
れるとともに、３信おきのラグに軸方向両外側に向かっ
て延びる羽根が設けられた農業用空気入りタイヤであり
、各羽根は半径方向内側に向かうに従い回転方向前方へ
傾斜して直線状に延びるとともに、半径方向線に対する
傾斜角は２５度から３５度の範囲内となっている。[Kan Nigen] Hitherto, as agricultural pneumatic tires used in paddy fields, etc., there have been known, for example, those described in Japanese Utility Model Application No. 130-138807. In this tire, a plurality of lugs protruding outward in the radial direction and whose width is approximately equal to the width of the tire are provided at equal distances apart in the circumferential direction, and the lugs at every third position extend outward on both sides in the axial direction. An agricultural pneumatic tire provided with extending blades, each blade extending in a straight line with an inclination toward the front in the direction of rotation as it goes inward in the radial direction, and the angle of inclination with respect to the radial direction is in the range of 25 degrees to 35 degrees. It is inside.
ところで、農業用空気入りタイヤは、各羽根の半径方向
線に対する交差角が小さいと、前進時の牽引力および後
退時の泥はけ性（泥の持上げ性）が良好となるが、浮力
が低下し、一方、前記交差角が大きいと、浮力は向上す
るが、前進時の牽引力および後退時の泥はけ性が低下し
、これらのものは二律背反的である。しかしながら、前
述したような農業用空気入りタイヤにあっては、各羽根
が直線状に延び半径方向線に対する交差角が１つの値し
かとれないため、前述した牽引力および泥はけ性と浮力
とが適当となったところで妥協するしかなく、このため
、前進時の牽引力、後退時の泥はけ性、浮力は未だ不充
分なものであった。By the way, in agricultural pneumatic tires, if the intersection angle of each blade with respect to the radial direction is small, the traction force when moving forward and the ability to remove mud (ability to lift mud) when reversing will be good, but the buoyancy will be reduced. On the other hand, when the crossing angle is large, the buoyancy is improved, but the traction force during forward movement and the mud removal performance during backward movement are reduced, and these are contradictory. However, in the agricultural pneumatic tire as described above, each blade extends in a straight line and the intersection angle with respect to the radial line can only take one value, so the traction force, mud drainage, and buoyancy described above are difficult to achieve. Compromises had to be made when appropriate, and as a result, the traction force when moving forward, the ability to remove mud when retreating, and the buoyancy were still insufficient.
この発明は、牽引力、泥はけ性および浮力を両立させる
ことができ、これらがいずれも良好である農業用空気入
りタイヤを提供することを目的とする。An object of the present invention is to provide an agricultural pneumatic tire that can achieve all of traction, mud removal, and buoyancy, all of which are good.
このような目的は、各羽根の半径方向外側部を半径方向
線に対して１５度から４０度の範囲内で交差させ、かつ
、その半径方向内側部を半径方向線に対して前記半径方
向外側部の交差角より１０度ないし３０度だけ大きい角
度で交差させることにより達成することができる。Such an objective is such that the radially outer part of each vane intersects the radial line within a range of 15 to 40 degrees, and the radially inner part intersects the radially outer part with respect to the radial line. This can be achieved by intersecting at an angle 10 to 30 degrees greater than the intersection angle of the parts.
また、この発明においては、前記各羽根の半径方向外側
部と半径方向内側部との境界を、ラグの半径方向外端か
らタイヤ高さの２０％ないし５０％の範囲内に位置させ
ることが好ましい。Further, in the present invention, it is preferable that the boundary between the radially outer part and the radially inner part of each blade be located within a range of 20% to 50% of the tire height from the radially outer end of the lug. .
さらに、この発明においては、前記各羽根の半径方向外
端を少なくともその大部分においてラグの半径方向外端
より ３Ｈないし２５１ｍ１１だけ半径方向内側に位置
させることが好ましい。Further, in the present invention, it is preferable that the radially outer end of each of the vanes is located radially inward at least in most part from the radially outer end of the lug by 3H to 251 m11.
１月 今、農業用機械に本発明のタイヤを装着し。January Now, the tire of the present invention is installed on agricultural machinery.
水田において前進しているとする。このとき、各羽根の
半径方向線に対する交差角は、半径方向外側部では小さ
く、一方、半径方向内側部では半径方向外側部の交差角
より大きいため、半径方向外側部は泥滓地内へ容易にか
つ深くめり込むことができるが、半径方向内側部はめり
込みに抵抗を示し、あまり泥滓地内にめり込むことがで
きない。Suppose you are moving forward in a rice field. At this time, the intersection angle of each blade with respect to the radial line is small at the radially outer part, while it is larger than the intersection angle at the radially outer part at the radially inner part, so that the radially outer part can easily penetrate into the sludge. Although it can be deeply embedded, the radially inner part shows resistance to penetration and cannot be penetrated into the muddy ground very much.
このように半径方向外側部が泥滓地へ深くめり込むこと
で、タイヤには大きな牽引力が与えられ、一方、半径方
向内側部がめり込みに抵抗することでタイヤに対し大き
な浮力を与える。また、前述のように羽根の半径方向外
側部の交差角が半径方向内側部の交差角より小さいので
、羽根の半径方向外側部は泥滓地から容易に抜き出され
、付着する泥の量も少なくなるとともに掬い上げる泥の
量も少なくなる。The radially outer part sinks deeply into the muddy ground, giving the tire a large traction force, while the radially inner part resists the digging, giving the tire a large buoyant force. In addition, as mentioned above, since the intersection angle of the radially outer part of the blade is smaller than the intersection angle of the radially inner part of the blade, the radially outer part of the blade can be easily extracted from the muddy ground, and the amount of mud that adheres to it can be reduced. As the amount decreases, the amount of mud scooped up also decreases.
また、前記各羽根の半径方向外側部と半径方向内側部と
の境界を、ラグの半径方向外端からタイヤ高さの２０％
ないし５０％の範囲内に位置させれば、前記牽引力、泥
はけ性および浮力の全てを良好とすることができる。Further, the boundary between the radially outer part and the radially inner part of each blade is set at 20% of the tire height from the radially outer end of the lug.
If it is located within the range of 50% to 50%, all of the above-mentioned tractive force, mud removal properties, and buoyancy can be made good.
さらに、前記各羽根の半径方向外端の少なくとも大部分
をラグの半径方向外端より ３ｍｍないし２５ｍｍだけ
半径方向内側に位置させれば、一般路での走行時に羽根
の接地を阻止することができ、これにより、乗心地性を
良好とすることができるとともに羽根の損傷を防止する
こともできる。Furthermore, if at least a majority of the radially outer ends of each of the blades are located 3 mm to 25 mm radially inward from the radially outer ends of the lugs, it is possible to prevent the blades from touching the ground when driving on public roads. This makes it possible to improve ride comfort and prevent damage to the blades.
支１１ 以下、この発明の一実施例を図面に基づいて説明する。Support 11 Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１，２．３図において、 １は農業用機械、例えば田
植機に装着される廃業用空気入りタイヤであり、このタ
イヤ ｌは前進時に矢印Ａ方向に回転する。前記タイヤ
１のトレッド部２の外周にはタイヤ １に一体成形さ
れたラグ３が周方向に等距離離れて複数個設けられ、こ
れらのラグ３は半径方向に延び平面形状は略菱形である
。各ラグ３の半径方向外端７における４＠Ｗは、タイヤ
幅Ｙに略等しく、タイヤ幅Ｙの７５％から １１０％で
あることが好ましい、その理由は、前記幅Ｗがタイヤ幅
Ｙの７５％未満であると、牽引力が低下するとともに一
般路での耐久性が低下し、一方、１００％を超えると、
泥の持ち上げ量が増大するからである。なお、この実施
例においては１幅Ｗはタイヤ幅Ｙの８３％（５０ｍｍ）
である、前記ラグ３のうち少なくとも１個おきのラグ３
には、この実施例では２個おきのラグ３には、一体成形
された一対の羽根５が設けられ、これらの羽根５は前記
ラグ３の軸方向両端にそれぞれ設けられ、いずれも軸方
向外側へ向かって等長だけ延びている。また、これらの
羽Ｍｉ５は前記ラグ３の半径方向外端部からタイヤ １
のサイドウオール部８まで延び、かつ、半径方向外端６
から半径方向内側に向かうに従い回転方向Ａ前方へ傾斜
するとともに１回転方向人後方に向かって僅かに凸状に
湾曲している。ここで、各羽根５の半径方向外端８は軸
方向内端部を除くその大部分がラグ３の半径方向外端７
より ３■ないし２５ｍｍだけ半径方向内側に位置して
いることが好ましく、この実施例では軸方向内端部にお
いて５ｍｍだけ、軸方向外端部において８ｍｍだけ半径
方向内側に位置させている。ここで、前述のように半径
方向外端ｅと半径方向外端７との半径方向距ｇｌＬを
３１烏ないし２５ｍ腸としたのは、 ３量■未満である
と、一般路の走行時に羽根５の半径方向外端６が接地し
て乗心地性が悪化するとともに羽根５が破損してしまう
からであり、一方、２５５ｍを超えると、羽根５の半径
方向長さが短くなって適切な牽引力、浮力が得られなく
なるからである。前記各羽根５は半径方向外側部ＩＯと
、この半径方向外側部１０に連続する半径方向内側部１
１と、から構成されており、一方の半径方向外側部１０
は半径方向線Ｈに対して１５度から４０度の範囲内の交
差角Ｂで交差し、残りの半径方向内側部１１は半径方向
線Ｒに対して前記半径方向外側部ｌＯの交差角Ｂより１
０度ないし３０度だけ大きい交差角りで交差している。In Figures 1 and 2.3, reference numeral 1 denotes a pneumatic tire for discontinuation that is attached to an agricultural machine, such as a rice transplanter, and this tire 1 rotates in the direction of arrow A when moving forward. On the outer periphery of the tread portion 2 of the tire 1, a plurality of lugs 3 integrally molded with the tire 1 are provided equidistantly apart in the circumferential direction, and these lugs 3 extend in the radial direction and have a substantially rhombic planar shape. 4@W at the radially outer end 7 of each lug 3 is approximately equal to the tire width Y, and is preferably from 75% to 110% of the tire width Y, because the width W is 75% of the tire width Y. If it is less than 100%, the traction force will decrease and the durability on public roads will decrease, while if it exceeds 100%,
This is because the amount of mud lifted increases. In this example, 1 width W is 83% (50 mm) of the tire width Y.
At least every other lug 3 among the lugs 3 is
In this embodiment, every second lug 3 is provided with a pair of integrally molded blades 5, and these blades 5 are provided at both ends of the lug 3 in the axial direction. It extends an equal length towards . Further, these wings Mi5 extend from the radially outer end of the lug 3 to the tire 1.
, and extends to the side wall portion 8 of the radially outer end 6
As it goes inward in the radial direction, it slopes forward in the rotational direction A and curves slightly convexly toward the rear in the one rotational direction. Here, most of the radially outer end 8 of each blade 5 except for the axially inner end is the radially outer end 7 of the lug 3.
It is preferable to be located radially inward by 3 mm to 25 mm, and in this embodiment is located 5 mm radially inward at the axially inner end and 8 mm radially inward at the axially outer end. Here, as mentioned above, the radial distance glL between the radial outer end e and the radial outer end 7 is
The reason why the length is 31 to 25 m is because if the amount is less than 3, the radially outer end 6 of the blade 5 will touch the ground when driving on a general road, resulting in poor riding comfort and damage to the blade 5. On the other hand, if the length exceeds 255 m, the radial length of the blades 5 becomes too short and appropriate traction force and buoyancy cannot be obtained. Each vane 5 has a radially outer part IO and a radially inner part 1 continuous with this radially outer part 10.
1, one radially outer part 10
intersects with the radial line H at an intersection angle B within the range of 15 degrees to 40 degrees, and the remaining radially inner portion 11 intersects with the radial line R at an intersection angle B of the radially outer portion lO. 1
They intersect at a larger intersection angle of 0 to 30 degrees.
この結果、これら半径方向外側部ＩＯと半径方向内側部
１１とは、モの境界Ｅにおいて折れ曲がっている。ここ
で、前記交差角Ｂはこの実施例では２０度であり、また
交差角りは３５度である６そして２ｔＪ記半径方向外側
部１０が半径方向線Ｈに対して１５度から４０度の範囲
内の交差角Ｂで交差しているのは、１５度未満であると
、浮力が低下し泥滓地へのめり込みおよび抜き出しの抵
抗が大となるからであり、一方、４０度を超えると、前
進時の牽引力および後退時の泥はけ性が悪化するからで
ある。また、前記半径方向内側部１１を半径方向線Ｒに
対して前記半径方向外側部１０の交差角Ｂより１０度な
いし３０度だけ大きい交差角りで交差させているのは、
交差角Ｂからの角度増大量が１０度未満であると、半径
方向内側部ｌｌが発生する浮力が小さくなり過ぎるから
であり、一方、角度増大量が３０度を超えると、後退時
の泥の持ち上げ量が増大するからである。また、前述し
た境界Ｅは、ラグ３の半径方向外端７かもタイヤ高さＨ
の２０％ないし５０％の範囲内に位置させることが好ま
しく、この実施例では４０％である。それは、タイヤ高
さＨの２０％未満であると、半径方向外側部１０ｆｔ（
短くなり過ぎて牽引力、泥はけ性が悪化するからであり
。As a result, the radially outer portion IO and the radially inner portion 11 are bent at the boundary E of the radially outer portion IO. Here, the intersection angle B is 20 degrees in this embodiment, and the intersection angle is 35 degrees. The reason why they intersect at the intersecting angle B is that if the angle is less than 15 degrees, the buoyancy will decrease and the resistance to sinking into the muddy ground and pulling out will be large.On the other hand, if it exceeds 40 degrees, the forward movement This is because the traction force when reversing the vehicle and the ability to remove mud when reversing are deteriorated. Furthermore, the reason why the radially inner portion 11 intersects the radial line R at an intersection angle that is 10 to 30 degrees larger than the intersection angle B of the radially outer portion 10 is as follows.
This is because if the angular increase from the crossing angle B is less than 10 degrees, the buoyancy generated by the radially inner portion ll will be too small, whereas if the angular increase exceeds 30 degrees, the mud will not flow when retreating. This is because the amount of lifting increases. In addition, the boundary E mentioned above is also the radial outer end 7 of the lug 3 at the tire height H.
It is preferably located within the range of 20% to 50%, and in this example it is 40%. It is less than 20% of the tire height H and the radially outer 10ft (
This is because if it becomes too short, traction and mud drainage will deteriorate.
方、タイ、ヤ高さＨの５０％を超えると、半径方向内側
部１１が短くなり過ぎて浮力が少なくなり、これらの範
囲内のときのみ両者を両立させて全てを良好とすること
ができるからである。On the other hand, if it exceeds 50% of the tie height H, the radially inner part 11 becomes too short and the buoyancy decreases, and only within these ranges can both be balanced and everything be good. It is from.
次に、この発明の一実施例の作用について説明する。Next, the operation of one embodiment of the present invention will be explained.
今、農業用機械に本発明のタイヤ１を装着し、水田にお
いて前進しているとする。このとき、各羽根５の半径方
向線Ｒに対する交差角は。Now, assume that the tire 1 of the present invention is mounted on an agricultural machine and the machine is moving forward in a rice field. At this time, the intersection angle of each blade 5 with respect to the radial direction line R is.
半径方向外側部］０では小さく、一方８半径方向内側部
ｌｌではそれより大きいため、半径方向外側部ｌＯは泥
棒地内へ容易にかつ深くめり込むことができるが、半径
方向内側部１１はめり込みに抵抗を示し、あまり泥棒地
内にめり込むことができない。Since the radially outer part 10 is small and the 8 radially inner part ll is larger, the radially outer part IO can be easily and deeply penetrated into the burglary area, but the radially inner part 11 resists penetration. This shows that the thieves are not able to get into the area too much.
このように半径方向外側部ｌＯが泥ｉｌ地へ深くめり込
むことで、タイヤ １には主にこの半径方向外側部１０
から牽引力が与えられ、一方、半径方向内側部■がめり
込みに抵抗することでタイヤ １に対し主に浮力が与え
られる。また、前述のように羽根５の半径方向外側部１
０の交差角Ｂが半径方向内側部１１の交差角りより小さ
いので１羽根５の半径方向外側部ＩＯは泥滓地から容易
に抜き出され、付着する泥の量も少なくなり、この際、
掬い上げる泥の量も少なくなる。ここで、この実施例に
おいては、前記各羽根５の半径方向外側部ｌＯと半径方
向内側部１１との境界Ｅを２ラグ３の半径方向外端７か
らタイヤ高さＨの２０％ないし５０％の範囲内に位置さ
せているため、前記牽引力、泥はけ性および浮力の全て
を良好とすることができる。さらに、前記各羽根５の半
径方向外端６の少なくとも大部分を、ラグ３の半径方向
外端７より ３ＩＩｍないし２５ｍｍだけ半径方向内側
に位置させているので、一般路での走行時に羽根５の接
地を阻止することができ、これにより、乗心地性を良好
とすることができるとともに羽根５の損傷を防止するこ
とができる。As the radially outer portion lO sinks deeply into the muddy soil, the tire 1 mainly has this radially outer portion 10.
A traction force is applied to the tire 1, while a buoyant force is mainly applied to the tire 1 by the radially inner part (■) resisting sinking. Further, as described above, the radially outer portion 1 of the blade 5
Since the intersection angle B of 0 is smaller than the intersection angle of the radially inner part 11, the radially outer part IO of one blade 5 can be easily extracted from the muddy ground, and the amount of mud that adheres to it is also reduced.
The amount of mud to be scooped up will also be reduced. Here, in this embodiment, the boundary E between the radially outer part lO and the radially inner part 11 of each blade 5 is 20% to 50% of the tire height H from the radially outer end 7 of the lug 3. Since it is located within the range of , all of the above-mentioned traction force, mud removal property, and buoyancy can be made good. Furthermore, since at least most of the radially outer ends 6 of each of the blades 5 are located 3IIm to 25 mm radially inward from the radially outer ends 7 of the lugs 3, the blades 5 are Ground contact can be prevented, thereby improving riding comfort and preventing damage to the blades 5.
次に、試験例を説明する。この試験に当っては、各羽根
が直線状で、半径方向線Ｒに対する交差角が３５度の一
定値で半径方向距＃ＬがＯｍｍである従来タイヤ１と、
各羽根が直線状で、半径方向線Ｈに対する交差角が２０
度の一定値で半径方向距離りが３１鳳である従来タイヤ
２と、前述の実施例で説明した供試タイヤと、を準備し
た。ここで、各タイヤのサイズは２．５０−２５であっ
た０次に、このような各タイヤを田植機に装着した後、
泥滓地を前進して牽引性能、泥はけ性を試験するととも
に、泥滓地を後退して泥はけ性を試験し、さらに、一般
路を走行して乗心地性を試験した。別表に比較タイヤｌ
の試験結果を指数１００として指数表示で示す、ここで
、牽引性能は指数値が大きくなるほど良好であり、逆に
、泥はけ性１乗心地性については指数値が小さいほど良
好である。Next, a test example will be explained. In this test, a conventional tire 1 in which each blade is linear, the intersection angle with respect to the radial direction line R is a constant value of 35 degrees, and the radial distance #L is Omm,
Each blade is straight and the intersection angle with respect to the radial line H is 20
A conventional tire 2 having a constant distance of 31 degrees and a radial distance of 31 mm and the test tire described in the above example were prepared. Here, the size of each tire was 2.50-25. After installing each such tire on the rice transplanter,
The vehicle was driven forward on muddy ground to test its traction performance and mud removal properties, and was also driven backwards through muddy ground to test its mud removal properties.Furthermore, it was driven on public roads to test ride comfort. Comparative tires in the attached table
The test results are shown in an index display with an index of 100, where the larger the index value is, the better the traction performance is, and conversely, the smaller the index value is, the better the mud removal performance and riding comfort.
なお、前述の実施例においては、各欄４１５の側面形状
を湾曲したものとしたが、この発明にあっては直線状に
延びていてもよい、また、前述の実施例においては、２
個おきのラグ３に羽根５を設けるようにしたが、この発
明にあっては、１個おき、あるいは３個、４個おきに設
けるようにしてもよい、さらに、前述の実施例において
は各羽根５の半径方向外ｆＩＡｅを、軸方向内端部を除
くその大部分でラグ３の半径方向外端７より半径方向内
側に位置させたが、この発明においては各羽根５の半径
方向外端６全てをラグ３の半径方向外端７より軸方向内
側に位置させてもよい。In the above-mentioned embodiment, the side shape of each column 415 was curved, but in the present invention, it may extend in a straight line.
Although the blades 5 are provided on every other lug 3, in the present invention, the blades 5 may be provided on every other lug, or every third or fourth lug. Most of the radially outer fIAe of the blades 5 except for the axially inner ends are located radially inward from the radially outer ends 7 of the lugs 3; however, in this invention, the radially outer ends of each blade 5 6 may be located axially inwardly from the radially outer end 7 of the lug 3.
１１立皇１
以上説明したように、この発明によれば、牽引力、泥は
け性および浮力を両立させることができ、これらをいず
れも良好とすることができる。11 Rikuo 1 As explained above, according to the present invention, it is possible to achieve both traction force, mud removal performance, and buoyancy, and it is possible to improve all of these properties.
第１図はこの発明の一実施例を示すその一部側面図、第
２図は第１図の■−工矢視断面図５第３図は第２図のＩ
Ｉ −ＩＩ矢視図である。
ｌ・・・タイヤ ２・・・トレッド部３・・
・ラグ ５・・・羽根６・・・羽根の半径
方向外端
７・・・ラグの半径方向外端
１０・・・半径方向外側部 １１・・・半径方向内側部
Ｙ・・・タイヤ輻 Ｒ・・・半径方向線Ｅ・・・
境界 Ｈ・・・タイヤ高さ特許出願人 株
式会社ブリデストン
代理人 弁理士 多 １）敏 峻
別
表
第
１・・・タイヤ
３・・・ラ グ
６・・・羽根の半径方向外端
１０・・・半径方向外側部
Ｒ・・・半径方向線
図
Ａ：ミ）
２・・・トレッド部
５・・・羽 根
７・・・ラグの半径方向外端
１１・・・半径方向内側部
Ｅ・・・境 界
Ｙ・・・タイヤ幅
Ｈ・・・タイヤ高さFig. 1 is a partial side view showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the line 5 in Fig. 1;
It is an I-II arrow direction view. l... Tire 2... Tread part 3...
- Lug 5...Blade 6...Radially outer end of the blade 7...Radially outer end of the lug 10...Radially outer part 11...Radially inner part Y...Tire radius R ...Radial direction line E...
Boundary H... Tire height Patent applicant Brideston Co., Ltd. Agent Patent attorney Tadashi 1) Satoshi Attached Table 1... Tire 3... Lug 6... Radial outer end of blade 10... Radial outer part R...Radial diagram A: Mi) 2...Tread part 5...Blade 7...Radial outer end 11 of lug...Radial inner part E... Boundary Y... Tire width H... Tire height
Claims (3)
幅がタイヤ幅と略等しいラグが周方向に離れて複数個設
けられるとともに、少なくとも１個おきのラグに軸方向
両外側に向かって延び半径方向内側に向かうに従い回転
方向前方へ傾斜した羽根が設けられた農業用空気入りタ
イヤにおいて、前記各羽根は、半径方向外側部が半径方
向線に対して１５度から４０度の範囲内で交差し、かつ
、半径方向内側部が半径方向線に対して前記半径方向外
側部の交差角より１０度ないし３０度だけ大きい角度で
交差していることを特徴とする農業用空気入りタイヤ。(1) A plurality of lugs are provided on the tread portion, which protrude outward in the radial direction and whose width is approximately equal to the width of the tire, spaced apart in the circumferential direction, and at least every other lug is provided with lugs that protrude outward in the radial direction and extend outward on both sides in the axial direction. In an agricultural pneumatic tire provided with blades that are inclined forward in the rotational direction toward the inner side, each of the blades has an outer portion in the radial direction that intersects the radial line within a range of 15 degrees to 40 degrees. , and the radially inner portion intersects the radial line at an angle that is 10 to 30 degrees greater than the intersection angle of the radially outer portion.
の境界は、ラグの半径方向外端からタイヤ高さの２０％
ないし５０％の範囲内に位置している請求項１記載の農
業用空気入りタイヤ。(2) The boundary between the radially outer part and the radially inner part of each blade is 20% of the tire height from the radially outer end of the lug.
The agricultural pneumatic tire according to claim 1, wherein the agricultural pneumatic tire is located within a range of 50% to 50%.
ラグの半径方向外端より３ｍｍないし２５ｍｍだけ半径
方向内側に位置している請求項１記載の農業用空気入り
タイヤ。3. The agricultural pneumatic tire of claim 1, wherein the radially outer end of each of the vanes is at least mostly located 3 mm to 25 mm radially inward from the radially outer end of the lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1025522A JPH02204102A (en) | 1989-02-03 | 1989-02-03 | Pneumatic tire for agriculture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1025522A JPH02204102A (en) | 1989-02-03 | 1989-02-03 | Pneumatic tire for agriculture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02204102A true JPH02204102A (en) | 1990-08-14 |
Family
ID=12168391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1025522A Pending JPH02204102A (en) | 1989-02-03 | 1989-02-03 | Pneumatic tire for agriculture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02204102A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106457917A (en) * | 2014-06-02 | 2017-02-22 | 株式会社普利司通 | Agriculture tire |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5830850A (en) * | 1981-08-20 | 1983-02-23 | Fujitsu General Ltd | Burglar alarm for car |
| JPS62286801A (en) * | 1986-06-04 | 1987-12-12 | Bridgestone Corp | Lug tyre used on off-road |
| JPS6317104A (en) * | 1986-07-08 | 1988-01-25 | Ohtsu Tire & Rubber Co Ltd | Farm vehicle wheel |
| JPH02204107A (en) * | 1989-01-31 | 1990-08-14 | Ohtsu Tire & Rubber Co Ltd :The | Lug-fitted rubber tire for argicultual machinery |
| JPH02204106A (en) * | 1989-01-31 | 1990-08-14 | Ohtsu Tire & Rubber Co Ltd :The | Lug-fitted rubber tire for agricultual machinery |
-
1989
- 1989-02-03 JP JP1025522A patent/JPH02204102A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5830850A (en) * | 1981-08-20 | 1983-02-23 | Fujitsu General Ltd | Burglar alarm for car |
| JPS62286801A (en) * | 1986-06-04 | 1987-12-12 | Bridgestone Corp | Lug tyre used on off-road |
| JPS6317104A (en) * | 1986-07-08 | 1988-01-25 | Ohtsu Tire & Rubber Co Ltd | Farm vehicle wheel |
| JPH02204107A (en) * | 1989-01-31 | 1990-08-14 | Ohtsu Tire & Rubber Co Ltd :The | Lug-fitted rubber tire for argicultual machinery |
| JPH02204106A (en) * | 1989-01-31 | 1990-08-14 | Ohtsu Tire & Rubber Co Ltd :The | Lug-fitted rubber tire for agricultual machinery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106457917A (en) * | 2014-06-02 | 2017-02-22 | 株式会社普利司通 | Agriculture tire |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3380647B2 (en) | Asymmetric tire tread | |
| CA2458858C (en) | Pneumatic tire with sidewall projections | |
| JP3860306B2 (en) | Agricultural pneumatic tire with directional lugs | |
| JP3652824B2 (en) | Pneumatic tire | |
| US5456301A (en) | Tire tread with improved resistance to chunking | |
| CN106042782A (en) | Reinforced tire tread | |
| US4791971A (en) | Pneumatic tractor tire | |
| CN101204912A (en) | Pneumatic tire | |
| US5010935A (en) | Agricultural tire and tread lug therefor | |
| CN101992659B (en) | Pneumatic tire | |
| AU2010214654A1 (en) | Pneumatic tyre | |
| CN102049975A (en) | Pneumatic tire | |
| JPH02204102A (en) | Pneumatic tire for agriculture | |
| US3645314A (en) | Wide tread tire for heavy-duty vehicles | |
| CN212889722U (en) | Beach vehicle tire | |
| CN215621208U (en) | Pneumatic tire for cross country racing | |
| JPH0335601Y2 (en) | ||
| JPH11170815A (en) | Pneumatic tire with lug | |
| JPS58152605A (en) | Tire serving concurrently as soft ground running use | |
| US2891594A (en) | Vehicle tire | |
| JPH0331008A (en) | Multi-purpose tire having lug | |
| JP2912874B2 (en) | Agricultural wheels | |
| JPH08150801A (en) | Farm wheel | |
| CN221417860U (en) | Mining area low-speed truck tire | |
| JPH0834209A (en) | Pneumatic tire with lug |